samsung LE40A456C Got verticle lines on right side of screen.

Just got a Samsung LE40A456C no known history .It has a lovely clear picture and sound BUT has 2 very narrow rows of 3 in each coloured lines and a wide about 4 inch goes green and changes to blue and seems to flicker,.I suspect T Con board but only a beginner so could be wrong, Any ideas out there you guys,,any help appreciated thankyou.

Update (12/10/2016)

Hi Old turkey03,

Do you mean the 2 white ones at the top of tcon board as you are looking at tv from the back open,(tv correct way up) in case it is i will do what you say with the 3 of them and get back with my findings with pics, Thankyou.

1 Answer

@moggy01 those look like TAB errors. remove the back housing and check the ribbon cables going to the LCD. Push on the ribbon cable the enters the LCD where the lines appear. See if those change. Also, check for corrosion on those cables. If it does make a difference it will be difficult to repair. Post some images of where the cables enter and what it looks like.

UPDATE

TAB=Tape Automated Bond is a way of how the LCD panel is "wired" by bonding each wire of the ribbon cable to the LCD panel. If one of those bonds filed, it creates the single pixel wide line. The bond can have failed or the wire may have come disconnected/corroded. Each panel is a bit different, so take a look at yours and let us know what you find.

Make sure that you also check to see if the lines are present in the test mode. If so then the cause is a most a bad panel Tab. If the lines do not appear, disconnect all signal sources and check again. If the lines are still in the Picture Test, checking the LVDS cable contacts or change the Main board. If the lines are gone, then a signal source is causing the problem.

Yes it could be T-con board error as well due to the wide strip on the on the Left side of your display. Check the TABS, replace the T-con board. TAB errors are seldom fixable due to the bonding required.

Always buy from places where you can return the boards in case it is not what caused the issue. Otherwise you end up with accumulating a whole bunch of boards quickly. Trust me, I've got plenty that I should have send back:-)